Willpower books that I've found useful and a couple of others
1. The Willpower Instinct by Kelly McGonigal. Based on a course at Stanford.
2. Willpower: rediscovering the greatest human strength. Baumeister. More research than (1) but also very good.
Anything from Brene Brown, especially if you find yourself hampered by perfectionism, guilt, or shame. (Look up her TED talks if you want a nice intro to her work.)
The Most Important Lesson No-one Ever Taught Me is fascinating; the subtitle is, "How I feel matters." (a favorite book of Peter Attia, MD at eatingacademy.com.)
Email: Outlook and Gmail, PC and Android
Lists: Paper organizer and Android for errands
Wondering about Evernote!